Improvement in steam-boiler furnaces



loIIAItLn's ,JOHN Hausmann, yor cHICAGO, ILLINOIS.

Lemrsram No. Io3,324, dated-May 24, 1ero.A

:M Pnovm/IENT 1N 'STEAM-Bomen summons.

The Schedule referred to :ln these Letters Patent'and makingpa'rt ofthe saine.

To all whom. 'it may concern:` l

Be it knownthatI, CABLES JOHN HAGSTREEM,

of Chicago, in the Vcounty of Cook and State of Illi-` nois, have invented a Smoke-'burning Fire-Box and I do hereby declare thatthe following is a'full. and

skilled in the art to make and use the same, reference being had to the accompanying drawing and letters marked thereon, making a part of this description, in which-` Figure 1 is an end elevation ofthe fire-box and boiler.

VFigure 2,' a broken elevation of the opposite end of the lire-box.

exact description thereof', which will enable those Figure v3, a longitudinal elevati-on of .a boiler. and

section of the tire-box.

Figure 4, a sectional elevationfof the innerl part of the door to the fire-box.

Figure 5, an end elevation `of the door. Figure. 6, a transverse central section'of the door.

Figure 7, a'sectional elevation of the front of the door. The object -of the present .invention'is to provide i more' eflicient means for burning the smoke in fire boxes of boilers;' and Its nature consists in the Anovell construction and arrangement of devices, by meansof which steam and used to prevent steam i'rornentering the smoke-stack,

and the latter to prevent steam from entering the tireboxA by means of a pipe, G, communicating with the pipe E H I.- r I This pipe G is so formed as to run parallel with a .I sliding gate, l?, as shown y@in figs. 2 and 3, and it" isr provided with curved pipes,.K, which conduct steam into holes, l, madeiu the rear and bottom part of the fire-box C, as shown more clearly in iig. 2.

In order to secure a suitable draught for the firebox when steam is-.enteling it, I construct a novcl door, figs. l, 3, 4, 5,6, 7. This 'door is formed of two shell-castings, X h, the'shell 7i being made somuch smaller than the shell X' that it willl shut into the tire-box, while the` shell X` will shut against the ontsid of a.

Between these two shell parts I place a partition,

(1,4gs. 6, 7, which has an opening, e, through, to adrnit air into the fire-box, said partition being provided Vwith a sliding door, c, to close the opening e when required.

To prevent an outward blast through the opening e, theshell part h of vthe door is provided with smallvv openings, b, near its end parts, by means of which and the partition g the current is mostlyor entirely broken.

lf, however, there should bea strong` blast, the

,outer shelll part X, having its openings Y Y" made near its under side, will etiectually stop sparks, and `pnt any fire there may be in them out.

The two parts ofthe door maybe fastened together by' bolts and nuts, or by any other means which will readily permitthe inner part 'to be 'removed when it y "is burned out, and replaced by a new castmg.

The-door is hinged to the front of the box C atl W W, fig. 1, and tp it, by means-of a linlr, V,is at` tached a lever, T; whose central part is pivoted to the fire-'box C, as shown `at figs. 1 and 3. j f The'lower end ottbis lever. is jointed to a crank,-

U,;which is fastenedto a rod, N having bearings, R

B., which project downward from the bottom ofthe tire-box,VA y

The opposite end of the rod- N is provided with a crank, O, which is -pivoted to Vthe sliding gate P, figs. 2 and 3, the'end S of the crank O being vso slotted out that itY will not biudon its pivot when the gate I is opened and closed. t

This arrangement is such that, when the gate X h is cpend,..the holes l will vbe closed by said gate I, and cioe. tersa, this arrangement being necessaryto prevent steam from blowing smoke and fire ont at thev door when open. r

'I do not intend to use but a little steam, and for that reason make theholes in the pipes K only about one-eighth oflan inch in diameter for an 4ordinarysized tire-box.

The-process of burning the smoke Iconsists in drive ing it back toward theV front of -the fire-box by a damp substance, which will so incorporate itself with the smokethat' the latter will be held in the fire-box long enough to be reburned, at thesame time providing the fire-box with the requisite air to produce, as

nearly as possible, perfect combustion.

Iuaddition to this, the construction is such that there isan active agitation of the air and steam inside of the fire-box, which does not'materially interfere 4with'the Adraught through. the flucs.

1. Having thus described my invention,

What I claim, and desireto secure by Letters Patentot the United States, is-

'L-The door X 11,con'structed in two parts, provided with openings b Y, a partition, g, and sliding door c, as and for the purpose set forth.

2. The doorX h, in combination with the lever T, 4cranks U O, rod N, and gate P, as described.

3. The. curved steam-pipes K, in combination with I the pipeV G E E I, and gate P, as set brth.

Y CHARLES JOHN HAGSTREEM.

Witnesses:

"E, M. KINNEY,

DE F. KINNEv. 

